Server custom error severity support (#24452).

pkg/analyzer/lib/src/generated/error.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer.src.generated.error;
 
 import 'dart:collection';
 
+import 'package:analyzer/source/error_processor.dart';
 import 'package:analyzer/src/generated/ast.dart' show AstNode;
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/parser.dart' show ParserErrorCode;
 import 'package:analyzer/src/generated/scanner.dart'
     show ScannerErrorCode, Token;
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/task/model.dart';
 import 'package:analyzer/task/model.dart';
 import 'package:source_span/source_span.dart';
 
 /**
- * The descriptor used to associate error filters with analysis contexts in
+ * The descriptor used to associate error processors with analysis contexts in
  * configuration data.
  */
-final ListResultDescriptor<List<ErrorFilter>> CONFIGURED_ERROR_FILTERS =
-    new ListResultDescriptorImpl('configured.errors', const <ErrorFilter>[]);
-
-/**
- * A predicate used to potentially filter an [error].
- *
- * Returns `true` if this error should be filtered from analysis results.
- */
-typedef bool ErrorFilter(AnalysisError error);
+final ListResultDescriptor<List<ErrorProcessor>> CONFIGURED_ERROR_PROCESSORS =
+    new ListResultDescriptorImpl('configured.errors', const <ErrorProcessor>[]);
 
 /**
  * An error discovered during the analysis of some Dart code.
  *
  * See [AnalysisErrorListener].
  */
 class AnalysisError {
   /**
    * An empty array of errors used when no errors are expected.
    */
@@ skipping 5614 matching lines @@
    * Initialize a newly created error code to have the given [name].
    */
   const TodoCode(String name) : super(name, "{0}");
 
   @override
   ErrorSeverity get errorSeverity => ErrorSeverity.INFO;
 
   @override
   ErrorType get type => ErrorType.TODO;
 }